Lifting-board for drop-hammers.



O. J. DALLEY= LIFTING BOARD FOR DROP HAMMERS. APPLICATION FILED JULY 9, 1910.

1 ,OO2,23 1 Patented Sept, 5, 1911.

UNITED srarss rarswr orrios.

CHARLES JOSIAH DAL LEY, F RARITAN, NEW JERSEY.

f To all {ivhom-it ndy Conan-n:

a'citizenf;offthe llnited States, residing at Raritan, in thejfc'ounty of; Somerset and State of NewJersey, have invented a new and 'nseful.,Lifting-Board for Drop-Ham- 'mers, ore-1110b the following is a specificaft'iony" Tliis invention relates to lifting boards vespecially designed for use in connection with drop hammers, one of its ob ects being to. prov de a device 'of this character which ;will not splitorbreak under the blows of theha nnier and which will not buckle;

' A further object .is' to provide a hammer ghoard up of zi plurality of strips held .l-lammerboards such as heretofore con-v structed have been either formed in single pie-ces'of; wood which soon split, or else have been formed of separate pieces connected by j metal, straps, bolts, etc. ,The constantlpounding of boards of this type however soon results in the loosening of the metal from the wood, thus rendering the board useless. Laminated boards have been found objectionable because the constant compression and release to which the boards.

are subjected soon loosens the layers where theyare joined together.

One of the objects of the present invention is to provide a hammer board which avoids all of the objections heretofore found.

Vith the foregoing and other objects in view the invention consists of certain noveldetails of construction and'combinations of parts hereinafter more fully described and pointed out in the claims.

In the accompanying drawings the pre-' ferred forms of the invention have been shown.

In said drawings :Figure 1- is an end elevation ofa hammer board constructed in accordance with the present invention. Fig. 2 is an edge view of the board. Fig. 3 is a section on line A-B Fig. 1. Fig. 4 is a detail view of one of the holding or dowel pins. Fig. 5 is a plan view of Specification of LettersPatent.

v purine-Beam), roa Dnor-nAMi/inns.

1,002,231. V Application filed .Tu1y9, 1910. Seria11o.5 71,2l3.

Patented se t. 5, let-i.

a board differing somewhat from the board shown in Figs. 1 to 3 inclusive.

Referring to the figures by characters of reference 1 and 2 designate strips of wood placed together, one of the strips 2 and both of the strips 1 being formed with longitudinally extending grooves 3 in one face thereof while the other strip 2 and both of the strips 1 have longitudinally extending tongues 4.- adapted' to fit snuglywithin the grooves 3. All of the strips are of the same size and proportions but the center strips 1 are preferably formed of avery hard wood, while the strips 2 are formed of a tough variety of wood. Bores 5 are out transversely through the strips 1 and 2, the ends of these bores being flared or enlarged, asindicated' at 6, and dowel pins 7 are fitted snugly within the bores, and havetheir end portions split longitudinally as shown at 8 so as to receiye wedges 9.

In assembling the parts of the board. a

strong-adhesive is placed upon the faces howing the tonguesand grooves and 't'hesa d tbngues and grooves are also supplied with an adhesive so-that, when thestrips are forced tightly together, they will cooperate to form a strong board,the parts of which interlock in the manner described. ,The

bores 5 are then formed within the strips andare flared after-which the dowel pins 7 are inserted into the boresand spread at their ends by driving wedges into the slits. The end portions of the pinswill thus hind tightly againstwalls of the enlarged ends of the bores and the several strips constituting the board will thus be securely anchored together-and it will be impossible to separate them by pounding. These dowel pins and wedges may be provided with an adhesive for holding them together and within the board.- Inasmuch as the grains of the strips d ffer, there is no danger of the board splitting longitudinally of any one of the strips, and, by providing very hard strips at the center of the board and tough strips at other points, the board obtained is rendered very durable and capable of offering the maximum resistance to the hammer.

Instead of utilizing dowel pins for the purpose of holding the strips together,

and through said strip and its tongueand into the next adjoining strip. These screws are arranged in staggered relation and as they are completely embedded within the.

wood'after the strips have been glued together, they will not work loose as a result of the constant pounding to which the board 'issubjected.

' Obviously-nails may be used in the same manner as the screws 10.' Also, if desired, light bolts'or rivets'may be usedin the ham- "mer board in the'same manner as are the dowels 7.

Various changes can of course be made in the CODStIIICtIOD' and arrangement of the partswit-hout departing from the spirit or sacrificing any of the advantages of the invention as defined in the appended claims.

What is claimed is hammerboard consisting of intere ngaging strips of wood of different varieties, and means extending transversely through the strips and through the interengaglng' portions thereof for fastening the strips together.

3.,A hammer board including inter-engaging tongued and grooved stripsof wood,

and"means extending transversely throu h the '.-tonguedand grooved portions of t e v"strips for fastening said strips-together.

" transversely exten 4. A hammer board consisting of tongued andfgrobved inter-engag g Strips YiQg sai g ores thereln,

f having enlarged end portions,'and fastening devices seated within the bores and having enlarged ends withinthe enlarged end portions of the bores. v p

5. A hammer board consisting of interengaging tonguedand grooved strips glued together, said strips having transversely extending bores therein. provided with enlarged end portions, dowel pins seated within the bores, and expanding devices within the end portions of the pins.

6. A hammer board consisting of a plurality of inter-engaging -tongued and grooved strips of the same size and .proportions, the top,'bott om and end faces of said strips lying in the same planes respectively, said strips being of dlfierentvarieties of wood.

7. A hammer'board consisting of a plurality of inter-engagingtongue and grooved strips of the same size and proportions, the

top, bottom and end faces of said strips lying in the same (planes respectively, there being bores exten pins seated within the bo'res, an'd-having diametrical slits in the ends" thereof, and Wedges seated withinthe slits and constituting means for ex anding the ends of the dowel pins Within t these bores. v

In testimony that I claim the foregoing as my own, I have hereto 'aflixed my signature in the presence of two witnesses.

' CHARLESJOSIAH DALLEY.

Witnesses; I, Josnrn J. SMITH,

Isaac D. DALrmr,

mg transversely throughthe strips and enlarged at their ends, dowel e enlarged portions of I 

